Here is a concept for
a pair of sunglasses with a built-in video camera, that records everything you see.
This appeals to me; any number of times I’ve seen something particularly interesting
or beautiful, and told myself, “if only I had a camera!” (This is
the same reason I want a camera phone.) If the camera was built into the glasses,
and always recording, I could always get back to those fleeting moments, those missing
memories. (link from Gizmodo.)